When unadapted to ketosis the body can excrete up to 100 kcal of ketones: As a side note, urinary and breath excretion of acetone is negligible in terms of caloric loss, amounting to a maximum of 100 calories per day (2).
Mate selection may also be a factor associated with bilateral symmetry in humans. A December 2005 article by health and environmental reporting expert, Ker Than, reports on an experiment that indicated women are more attracted to men that have more symmetrical features.
Symmetry in biology is the balanced distribution of duplicate body parts or shapes. In nature and biology, symmetry is approximate. For example, plant leaves, while considered symmetrical, rarely match up exactly when folded in half.ymmetry in biology is the balanced distribution of duplicate body parts or shapes. In nature and biology, symmetry is approximate. For example, plant leaves, while considered symmetrical, rarely match up exactly when folded in half.